#include <stdio.h>
#include <stdlib.h>
#include<sys/types.h>
#include<unistd.h>
int main()
{
  pid_t id = fork();
  if(id < 0){
  perror("fork");
  return 1;
  }
else if(id > 0)
  { //parent
  printf("parent[%d] is sleeping...\n", getpid());
  sleep(30);
  }
else
  {
  printf("child[%d] is begin Z...\n", getpid());
  sleep(5);
  exit(EXIT_SUCCESS);
  }
return 0;
}
